超深方块码头稳定性的离心模型试验

用土工物理离心模型试验对超深重力式方块码头稳定性进行试验研究,试验选用码头顶面尺寸为9.5 m(方案1)与8.5 m(方案2)两种常规方案进行比较,得到码头运营期在水平位移、码头面沉降、地基土中孔隙水压力的最大值分别为42 mm1、10 mm1、90 kPa和82 mm2、22 mm3、20 kPa。结果表明:码头稳定性的离心模型试验方法是有效的;方案2的水平位移与码头面沉降远远大于方案1,超出规范允许范围,而且其超静孔压消散较慢对工程稳定不利,因此,建议选用方案1作为设计方案。

Centrifuge Modeling of Stability for the Wharf Made of Super-deep Block

A study on the centrifuge model test for the stability of gravity concrete block wharf wall has been carried out.Two schemes are compared for revealing the stability differences between two super-deep gravity concrete block quay with top sizes of 9.5 m(scheme 1) and 8.5 m(scheme 2),respectively.The results show that the horizontal displacement is 42 mm and 82 mm,the ground subsidence is 110 mm and 222 mm,as well as the pore pressure is 320 kPa in the groundsill,respectively.It is confirmed that centrifuge model test for wharf wall stability is effective.The value of horizontal displacement and ground subsidence of scheme 2 is larger than the scheme 1,which is out of permission of criterion,and the disbennifit to the stability of project is obviously due to the excess pore pressure disappeared slowly.The conclusion is that the scheme 1 with top size of 9.5 m is preferable.